People using Wellington Regional Hospital's Emergency Department waiting room as a shortcut are increasing the risk of spreading disease.
In a statement Capital and Coast District Health Board said the ED was experiencing a high level of unnecessary foot traffic through its waiting room, because people were cutting through to get to other areas of the hospital.
"This can affect the ability of ED staff to properly triage and manage patients, and hinders infection control measures by increasing the risk of spreading contagion to other areas of the hospital.
"This is particularly important as health authorities respond to Covid-19 and prepare for the coming flu season, which is expected to see an increase in unwell people presenting to ED with flu and flu-like symptoms", the DHB said.
The DHB has urged people to only use the entrance to the ED if they are specifically seeking ED care.